Fountain-pen.



Patented Sept. 5, |899.

Arr-MM MPM UNM

BAM

CFM

{No Model.)

IINTTEE STATES PATENT OFFICE.

CLAES WILIAM BOMAN, OF NElV YORK, N. Y., ASSIGNOR TO THE EAGLE PENCILCOMPANY, OF NEW YORK.

FOYU NTAlN-PEN.

SPECIFICATION forming part of Letters Patent No. 632,633,dated'Se-ptember 5, 1899.

Application filed (lune 27, 1899, Serial No. 722,046. (No model.)

To @ZZ whom, t may concern:

Be it known that I, CLAES 'WILIAM ROMAN, a citizen of the United States,and a resident of New York city, in the county and State of New York,have invented a new and useful Improvement in Fountain-Pens, of whichthe following is a specification, reference being had to theaccompanying drawings,in which- Figure l is a longitudinal centralsection of the pen. Fig. 2 is a similar view with the ink-reservoirpartly withdrawn from the tubular sheath or handle. Fig. 3 is a view ofthe ink-reservoir detached from the handle.

A is a tubular sheath or handle made of any suitable material,preferably hard rubber. B is the usual feeder-plug inserted in its frontend. This feeder-plug, which may be of any preferred construction,conducts the ink from the ink-reservoir in the handle to the pen C inthe usual way, the pen being inserted and held between the feeder andthe front end of the handle.

The ink-reservoir is shown at D. It is made of any proper material,preferably hard rubber, is open at its front end and closed at its rearend by a plug E, which is externally screw-threaded to screw into thecorrespondin gly internally screw-threaded open rear end of the handleA. The reservoir is inserted into the handle from the rear of thelatter, and the screw-plug E, with which it is provided, forms aconvenient means of securing it. The screw-joint, however, is notessential to the making and maintaining of an air and liquid tight jointbetween the reservoir and the handle, and so far as that is concernedthe screw-joint might be replaced by abayonet-catch or a slip orfriction joint. The liquid-tight joint for preventing leakage of inkbetween the reservoir and the tubular sheath or handle is internal andat the front end of the reservoir and is Ina-de and maintainedindependently of the external joint. The front end of the reservoir isin eifect a piston which has an elastic and compressible packing betweenit and the cylindrical interior of the tubular handle A. In other words,it works in the handle about as a packed piston does in its cylinder.This effect I obtain It is flared or cxthe flared or enlarged part clinthe act ofentering the smooth cylindrical interior of the handle will beslightly compressed and by its elasticity will make with the interior ofthe handle a tight and close joint, which will effectually prevent allleakage. This joint is complete and effective after the front end of thereservoir has once entered the handle far enough to pass beyond theinternally screwthreaded end of the latter, which is just a littlegreater in diameter than the smooth intern al cylindrical bore beyondit. The joint, for example, between the front end of the reservoir andthe handle is just as complete .and finished when the reservoir is onlypart way in, as in Fig. 2, as it is when the reservoir is completely in,as in Fig. l. Thus it is immaterial, so far as this'jointis concerned,whether the plug E is screwed home or not, or, indeed, whether the plugE is engaged at all with the handle.

The elastic and compressible enlargement d not only avoids the necessityof nice and accurate finish and tting, but it acts as a wiper for theinterior of the barrel or hollow handle to keep it clean and unclogged.

Having described my invention, what -I claim herein as new, and desireto secure by Letters Patent, is-

In a fountain-pen, the combination with the hollow handle A, of atubular ink-reservoir D adapted to enter the handle from the rear end ofthe latter, and provided with a flaring, elastic and compressible openfront end, of greater diameter than the body of the reservoir with whichit is integral, and which piston-like fits closely and with elasticpressure against the cylindrical interior of the handle, as and for thepurposes hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 26th day of June,1899.

CLAES WILIAM BOM AN.

Y lVitnesses:

SAMUEL KEAUS, M. REGENSBURG.

